AbstractBuilder.h

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/***************************************************************************
 *
 * Copyright (C) 2009-2011 Cassio Neri Moreira
 *
 * This file is part of the KeyValue library.
 *
 * The KeyValue library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * The KeyValue library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with KeyValue. If not, see <http://www.gnu.org/licenses/>.
 *
 * If you modify this library, or any covered work, by linking or combining
 * it with Excel (or a modified version of that program), containing parts
 * covered by the terms of End-User License Agreement for Microsoft
 * Software, the licensors of KeyValue grant you additional permission to
 * convey the resulting work.
 *
 **************************************************************************/

#ifndef KEYVALUE_MNGT_ABSTRACTBUILDER_H_
#define KEYVALUE_MNGT_ABSTRACTBUILDER_H_

#include <typeinfo>

#include "keyvalue/mngt/Processor.h"

namespace keyvalue {

class AbstractBuilder :

  public Processor {

public:

  template <typename ObjectType>
  bool
  canBuild() const;

  virtual const ::std::type_info&
  getObjectType() const = 0;

private:

  virtual void
  thrower() const = 0;

}; // class AbstractBuilder

/*--------------------------------------------------------------------------
 * canBuild()
 *------------------------------------------------------------------------*/

template <typename ObjectType>
bool
AbstractBuilder::canBuild() const {
  try {
    thrower();
  }
  catch (ObjectType*) {
    return true;
  }
  catch (...) {
  }
  return false;
}

} // namespace keyvalue

#endif // KEYVALUE_MNGT_ABSTRACTBUILDER_H_